JP2009222119A - Shift operation mechanism for transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift operation mechanism for a transmission, having a reduced weight by combining a select check mechanism and a shift check mechanism into one mechanism. <P>SOLUTION: The shift operation mechanism 1 includes a shift lever 6, a shift rod 4, a holding member 3, and a thrust mechanism 2. The shift rod 4 as a member to be linked with the shift lever 6 is supported to be relatively rotatable and relatively movable in the axial direction by a case 5 of a transmission body. The holding member 3 is provided on the shift rod 4. The thrust mechanism 2 is fixed to the case 5. The thrust mechanism 2 has a first ball member 26 for abutting on the holding member 3, and pushes the first ball member 26 against the holding member 3. The holding member 3 has a neutral holding part C1 into which the first ball member 26 can be fitted so that the shift rod 4 is held on the case 5 in a select operating (rotating) direction, and a first-speed holding part Q1 into which the first ball member 26 can be fitted so that the shift rod 4 is held on the case 5 in a shift operating (axial) direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shift operation mechanism, and more particularly to a shift operation mechanism for a manual transmission.

  A manual transmission is known as a vehicle transmission. The manual transmission includes a transmission main body and a speed change operation mechanism for operating a speed change operation of the transmission main body via a shift lever. The transmission main body includes a case, an input shaft, a main shaft, a plurality of gears, and a plurality of synchronization mechanisms. The input shaft and the main shaft are supported by the case so as to be relatively rotatable. As the sleeve of the synchro mechanism moves in the axial direction, the connection state between the gear and the shaft is switched. The operation of the sleeve of the synchro mechanism is operated by the speed change operation mechanism.

  In general, the speed change operation mechanism mainly includes a shift lever and a shift rod. The shift rod is supported by the transmission main body so as to be relatively rotatable and relatively movable in the axial direction. The switching state in the plurality of synchro mechanisms is determined by the position and rotation angle of the shift rod in the axial direction. The position of the shift rod with respect to the transmission main body can be operated by a shift lever. For example, the rotation direction of the shift rod is the select operation direction, and the axial direction of the shift rod is the shift operation direction.

  Further, the shift operation mechanism is provided with a select check mechanism, a select return mechanism, a select stopper mechanism, a shift check mechanism, and a shift stopper mechanism. The select check mechanism is a mechanism for holding the shift rod in a neutral position (see, for example, Patent Document 1). The select return mechanism is a mechanism for returning the shift rod to the neutral position. When the shift rod is rotated in the select operation direction from the neutral position, the shift rod returns to the neutral position by applying a rotational force to the shift rod.

The select stopper mechanism limits the rotation angle of the shift rod in the select operation direction within a predetermined angle range. The shift check mechanism positions the shift rod in the shift operation direction in accordance with each shift stage. The shift stopper mechanism limits the movement range of the shift rod in the shift operation direction to a predetermined range.
Japanese Utility Model Publication No. 3-49460

  In the conventional speed change operation mechanism, since the mechanisms such as the above-described select check mechanism are provided independently, the number of parts increases. As a result, the weight of the transmission increases.

  An object of the present invention is to reduce the weight of a speed change operation mechanism of a transmission.

  The speed change operation mechanism according to the present invention includes a shift lever, a shift rod, a holding member, and a pressing mechanism. The shift lever is supported by the case of the transmission main body. The shift rod is a member provided so as to interlock with the shift lever, and is supported by the case so as to be movable or rotatable in the select operation direction and movable or rotatable in the shift operation direction. . The holding member is provided on one of the case and the shift rod. The pressing mechanism is a mechanism fixed to the other of the case and the shift rod, has a contact member that contacts the holding member, and presses the contact member against the holding member. The holding member includes a first holding portion into which the contact member can be fitted so that the shift rod is held in the select operation direction with respect to the case, and a shift rod that is held in the shift operation direction with respect to the case. And a second holding part into which the contact member can be fitted.

  Here, the holding member and the case or the shift rod may be separate members or may be integrally formed.

  In this speed change operation mechanism, when the contact member of the pressing mechanism is fitted into the first holding portion of the holding member, the shift rod is held in the select operation direction. When the contact member is fitted into the second holding portion, the shift rod is held in the shift operation direction. That is, the select check mechanism and the shift check mechanism are realized by the pressing mechanism and the holding member. Thereby, the select check mechanism and the shift check mechanism can be combined into one mechanism, and the number of parts can be reduced.

  As described above, in the speed change operation mechanism according to the present invention, the number of parts can be reduced, so that the weight can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Overall configuration of speed change operation mechanism>
A speed change operating mechanism 1 as an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of the speed change operation mechanism 1.

  The manual transmission (not shown) includes a transmission main body (not shown) and a speed change operation mechanism 1. The speed change operation mechanism 1 is a mechanism for operating a speed change operation of the transmission main body, and corresponds to, for example, a six-speed shift. As shown in FIG. 1, the speed change operation mechanism 1 includes a shift lever 6, a shift rod 4, a pressing mechanism 2, and a holding member 3 fixed to the shift rod 4.

  The shift rod 4 is supported by the case 5 of the transmission main body so as to be relatively rotatable about the rotation axis A and to be relatively movable in a direction along the rotation axis A (axial direction). As shown in FIG. 1, the right side in the axial direction is defined as the S1 side, and the left side in the axial direction is defined as the S2 side. Further, as shown in FIG. 1, the clockwise direction when viewed from the right side is defined as the rotational direction R1 side, and the counterclockwise direction is defined as the rotational direction R2 side. The pressing mechanism 2 is fixed to the case 5 of the transmission main body. A shift lever 6 is connected to the end of the shift rod 4. By operating the shift lever 6, the shift rod 4 can be moved in the axial direction or rotated around the rotation axis A. The rotation direction of the shift rod 4 is an example of the select operation direction, and the axial direction is an example of the shift operation direction.

<Detailed configuration of the speed change mechanism>
In this speed change operation mechanism 1, a selection check mechanism, a selection return mechanism, a selection stopper mechanism, a shift check mechanism, and a shift stopper mechanism are realized by the pressing mechanism 2 and the holding member 3. Hereinafter, the detailed structure of the speed change operation mechanism 1 will be described with reference to FIGS. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a schematic perspective view of the holding member 3. 2 and 3 show a state where the shift rod 4 is in the neutral position.

(1) Pressing mechanism As shown in FIGS. 2 and 3, the pressing mechanism 2 is a mechanism for applying a pressing force to the holding member 3, and is supported by the bearing support member 22 and the bearing support member 22 so as to be relatively movable. A cylinder 25, a first ball member 26 (an example of a contact member) rotatably provided at an end of the cylinder 25, and a spring 27 that presses the first ball member 26 against the holding member 3. ing. An end portion of the bearing support member 22 is fitted into the case 5. For example, the axis D, which is the center line of the bearing support member 22, is orthogonal to the rotation axis A. The moving directions of the cylinder 25 and the first ball member 26 substantially coincide with the axis D. The spring 27 is disposed in the bearing support member 22 in a pre-compressed state. The first ball member 26 is spherical, and the center of the first ball member 26 is disposed on the axis D. A plurality of second ball members 28 (an example of rolling elements) are disposed between the first ball member 26 and the cylinder 25. The first ball member 26 is rotatable with respect to the cylinder 25 by the second ball member 28.

  Further, the pressing mechanism 2 includes a cylindrical protection member 23 and a bearing 24 that rotatably supports the protection member 23 with respect to the bearing support member 22. The protective member 23 and the bearing 24 are supported by the flange 22 a of the bearing support member 22. The first ball member 26 is pressed against the uneven surface of the holding member 3 by the spring 27.

(2) Holding Member The holding member 3 is a member for positioning the shift rod 4 with respect to the case 5 and is fixed to the shift rod 4 via a sleeve 41. The holding member 3 is, for example, a metal member. Concavities and convexities for positioning are formed on the upper surface of the holding member 3 on the pressing mechanism 2 side. The holding member 3 is integrally formed including these irregularities. When the first ball member 26 of the pressing mechanism 2 described above is pressed against these irregularities, the position of the shift rod 4 is held according to the shape of the holding member 3.

  Specifically, as shown in FIG. 4, the holding member 3 includes a neutral holding part C1 (an example of a first holding part), a first guide part C2 (an example of a guide part), and a second guide part C3 (a guide). An example).

  The neutral holding portion C1 is a portion for holding the shift rod 4 in the neutral position, and includes a groove G extending between the first guide portion C2 and the second guide portion C3 and extending in the axial direction. The depth of the groove G is set such that the first ball member 26 can come out when a predetermined operating force is applied to the shift lever 6.

  As shown in FIG. 2, the first guide portion C2 and the second guide portion C3 are arranged on the radially outer side with respect to the imaginary line K with the rotation axis A as the center. That is, the 1st guide part C2 and the 2nd guide part C3 are formed so that the distance from the rotating shaft A may become long as it leaves | separates from the neutral holding | maintenance part C1. In other words, the first guide part C2 and the second guide part C3 are slightly inclined so as to descend toward the neutral holding part C1. With such a configuration, the pressing force of the pressing mechanism 2 is converted into the rotational force of the shift rod 4 in the first guide portion C2 and the second guide portion C3.

  For example, when the holding member 3 rotates from the neutral position, the first ball member 26 of the pressing mechanism 2 is pressed against the first guide portion C2. As a result, a part of the pressing force of the pressing mechanism 2 is converted into the rotational force of the holding member 3 by the first guide portion C2 (see FIG. 5 described later). For this reason, when the holding member 3 is rotated by the pressing force of the pressing mechanism 2, the first ball member 26 is guided to the neutral holding portion C1 by the first guide portion C2, and the first ball member 26 is fitted into the neutral holding portion C1. . The second guide C3 is the same as the first guide C2.

  Moreover, as shown in FIG. 4, the holding member 3 has the 1st speed holding | maintenance part Q1-the 6th speed holding | maintenance part Q6. The 1st speed-6th speed holding | maintenance part Q1-Q6 is an example of a 2nd holding | maintenance part.

  The first speed holding portion Q1 to the sixth speed holding portion Q6 are portions for holding the shift rod 4 in the state of the first speed to the sixth speed. When the first ball member 26 is fitted in the first speed holding portion Q1 to the sixth speed holding portion Q6, the shift rod 4 is held at least in the axial direction. As shown in FIG. 4, it can be said that the groove G of the neutral holding part C1 is formed by the first speed holding part Q1 to the sixth speed holding part Q6.

  The 1st speed holding | maintenance part Q1 is formed of the 1st protrusion part P1 and the 1st inclination part P11. The 2nd speed holding | maintenance part Q2 is formed of the 2nd protrusion part P2 and the 2nd inclination part P12. The 3rd speed holding | maintenance part Q3 is formed of the 3rd protrusion part P3 and the 3rd inclination part P13. The 4th speed holding | maintenance part Q4 is formed of the 4th protrusion part P4 and the 4th inclination part P14. The fifth speed holding portion Q5 is formed by a fifth protruding portion P5 and a fifth inclined portion P15. The sixth speed holding portion Q6 is formed by a sixth projecting portion P6 and a sixth inclined portion P16.

  Moreover, the neutral holding | maintenance part C1 is mainly formed of the 3rd protrusion part P3 and the 4th protrusion part P4. The first guide part C2 is formed by a first protrusion part P1 and a second protrusion part P2. The 2nd guide part C3 is formed of the 5th protrusion part P5 and the 6th protrusion part P6.

  The first projecting portion P1 to the sixth projecting portion P6 are portions that generate a resistance force when the gear position is switched in order to make the driver recognize whether or not the gear position has been switched. The sense of whether or not the gear position has been switched is generally referred to as moderation.

  The 1st protrusion part P1, the 2nd protrusion part P2, the 5th protrusion part P5, and the 6th protrusion part P6 are the mountain shapes which have two inclined surfaces, and have substantially the same shape, respectively. The heights of the first protrusion P1, the second protrusion P2, the fifth protrusion P5, and the sixth protrusion P6 with respect to the rotation axis A (the distance in the vertical direction in FIG. 4) are substantially the same. The first inclined part P11, the second inclined part P12, the fifth inclined part P15, and the sixth inclined part P16 have one inclined surface, and the height with respect to the rotation axis A is substantially the same.

  With these configurations, the first speed holding portion Q1, the second speed holding portion Q2, the fifth speed holding portion Q5, and the sixth speed holding portion Q6 have substantially the same height with respect to the rotation axis A. .

  On the other hand, the 3rd protrusion part P3 and the 4th protrusion part P4 are the mountain shapes which have two inclined surfaces, and respectively have the substantially same shape. The height of the third protrusion P3 and the fourth protrusion P4 with respect to the rotation axis A (the distance in the vertical direction in FIG. 4) is substantially the same. The third inclined portion P13 and the fourth inclined portion P14 have one inclined surface, and the heights with respect to the rotation axis A are substantially the same. The bottom surface of the groove G is formed by the third protrusion P3, the fourth protrusion P4, the third inclined part P13, and the fourth inclined part P14.

  The first speed holding portion Q1 to the sixth speed holding portion Q6 are surrounded by a pair of first side wall portions 33 and a pair of second side wall portions 34. Specifically, as shown in FIGS. 2 to 4, the first side wall 33 is disposed so as to be able to contact the pressing mechanism 2 (more specifically, the protection member 23) in the rotation direction. The second side wall portion 34 is disposed so as to be able to contact the pressing mechanism 2 (more specifically, the protection member 23) in the axial direction.

  As shown in FIGS. 2-4, the 1st side wall part 33 is a plate-shaped part extended in an axial direction. One first side wall 33 is arranged in the rotational direction with the first speed holding portion Q1, the first guide portion C2, and the second speed holding portion Q2, and more specifically, the first speed holding portion Q1, The first guide portion C2 and the second speed holding portion Q2 are disposed on the outer side in the rotational direction (the side opposite to the neutral holding portion C1). The other first side wall 33 is arranged side by side with the fifth speed holding portion Q5, the second guide portion C3, and the sixth speed holding portion Q6 in the rotational direction, and more specifically, the fifth speed holding portion Q5. The second guide portion C3 and the sixth speed holding portion Q6 are disposed on the outer side in the rotational direction (the side opposite to the neutral holding portion C1). The second side wall portion 34 is a plate-like portion that extends substantially in the rotational direction. One second side wall portion 34 is arranged in the axial direction with the first inclined portion P11, the third inclined portion P13, and the fifth inclined portion P15, and more specifically, the first inclined portion P11, the third inclined portion P11, and the third inclined portion P11. It arrange | positions in the axial direction outer side (opposite side to the neutral holding | maintenance part C1) of the inclination part P13 and the 5th inclination part P15. The other second side wall portion 34 is arranged in the axial direction with the second inclined portion P12, the fourth inclined portion P14, and the sixth inclined portion P16, and the second inclined portion P12, the fourth inclined portion P14, and the second inclined portion P14. 6 It is arrange | positioned on the axial direction outer side (opposite side to the neutral holding | maintenance part C1) of the inclination part P16.

  As described above, the first side wall 33 and the second side wall 34 restrict the relative movement in the rotational direction and the axial direction of the pressing mechanism 2 and the holding member 3 within a predetermined range.

<Operation of gear shifting mechanism>
The speed change operation mechanism 1 will be described with reference to FIGS. The position of the shift lever 6 is shown in the upper left or lower left of FIGS.

  As shown in FIGS. 2 and 3, when the first ball member 26 of the pressing mechanism 2 is fitted in the neutral holding portion C <b> 1 (more specifically, the groove G), a predetermined operating force acts on the shift lever 6. Otherwise, the holding member 3 does not rotate. That is, the selection mechanism that holds the holding member 3 in the neutral position is realized by the pressing mechanism 2 and the neutral holding portion C1.

  When the driver operates the shift lever 6 in the select operation direction (rotation direction) from the neutral state in which the first ball member 26 is fitted in the neutral holding portion C1, for example, the holding member 3 is on the R2 side with the rotation axis A as the center. Rotate to. At this time, when the operating force of the shift lever 6 overcomes the pressing force of the spring 27 (the holding force generated by the pressing mechanism 2 and the neutral holding portion C1), the spring 27 is compressed. As a result, the fitting of the first ball member 26 into the groove G is released, and the first ball member 26 moves while rotating on the first guide portion C2 (FIG. 5).

  As described above, since the second guide portion C3 is disposed radially outside the imaginary line K, the first guide portion C2 is inclined with respect to the axis D when the holding member 3 rotates. As a result, the direction in which the pressing force transmitted from the first ball member 26 acts on the first guide portion C2 is inclined with respect to the axis D, and a rotational force around the rotation axis A acts on the holding member 3. Therefore, when the operating force of the shift lever 6 is released in the state shown in FIG. 5, the holding member 3 rotates to the R1 side, and the first ball member 26 fits into the groove G of the neutral holding portion C1 (FIG. 2). The case of the second guide C3 is the same as that of the first guide C2.

  Thus, the select return mechanism for returning the shift rod 4 to the neutral position is realized by the pressing mechanism 2, the first guide portion C2, and the second guide portion C3.

  Further, when the holding member 3 rotates to the R2 side by a predetermined angle, the protective member 23 of the pressing mechanism 2 comes into contact with the first side wall portion 33. For this reason, it is possible to prevent the pressing mechanism 2 from dropping from the holding member 3. That is, the selection stopper mechanism is realized by the pressing mechanism 2 and the first side wall portion 33.

  When the shift lever 6 is operated to the first speed side from the state shown in FIGS. 5 and 6, the shift rod 4 and the holding member 3 move to the S1 side, and the first ball member 26 rotates as shown in FIG. While climbing on the first protrusion P1. At this time, the compression amount of the spring 27 increases, and the pressing force of the spring 27 increases accordingly. This pressing force becomes a resistance force when the shift lever 6 is operated, and the driver can recognize whether or not the gear position is switched by this resistance force.

  When the shift lever 6 is further operated to the first speed side, as shown in FIG. 8, the first ball member 26 gets over the first projecting portion P1 and fits into the first speed holding portion Q1. In the first speed holding portion Q1, since the first ball member 26 is in contact with the first protruding portion P1 and the first inclined portion P11, the axial position of the holding member 3 with respect to the case 5 in the state shown in FIG. The holding member 3 and the shift rod 4 are held in the axial direction.

  Thus, the shift check mechanism for holding the shift rod 4 in the axial direction is realized by the pressing mechanism 2 and the first speed holding portion Q1.

  Further, when the shift lever 6 is further operated to the first speed side from the state shown in FIG. 8, the protective member 23 of the pressing mechanism 2 comes into contact with the second side wall portion 34. For this reason, it is possible to prevent the pressing mechanism 2 from dropping from the holding member 3. That is, the shift stopper mechanism is realized by the pressing mechanism 2 and the second side wall portion 34.

  Here, the case where the shift lever 6 is operated to the first speed is described as an example, but the operation is the same in the case of the second speed to the sixth speed, and detailed description thereof is omitted.

<Characteristics of transmission operation mechanism>
The characteristics of the speed change operation mechanism 1 are as follows.

(1)
In this speed change operation mechanism 1, when the first ball member 26 of the pressing mechanism 2 comes into contact with the neutral holding portion C1 of the holding member 3, depending on the pressing force of the pressing mechanism 2 and the shape of the neutral holding portion C1, a certain axial position The shift rod 4 is held in the rotational direction. That is, a selection check mechanism is realized by the pressing mechanism 2 and the neutral holding portion C1.

  Further, for example, when the first ball member 26 is fitted into the first speed holding portion Q1, the positions of the holding member 3 and the shift rod 4 with respect to the case 5 are determined. In this state, the shift rod 4 is held in the axial direction by the pressing mechanism 2 and the holding member 3. That is, the shift check mechanism is realized by the pressing mechanism 2 and the first speed holding portion Q1.

  As described above, in the shift operation mechanism 1, the select check mechanism and the shift check mechanism can be combined into one mechanism including the pressing mechanism 2 and the holding member 3. As a result, the number of parts can be reduced, the weight can be reduced, and the transmission can be reduced in size.

  Similar to the first speed holding portion Q1, the second speed holding portion Q2, the fifth speed holding portion Q5, and the sixth speed holding portion Q6 can also be reduced in weight.

(2)
In this speed change operation mechanism 1, the holding member 3 has a first guide part C2 and a second guide part C3. In the first guide portion C2, a part of the pressing force of the spring 27 is converted into the rotational force of the holding member 3 and the shift rod 4 so that the first ball member 26 is guided toward the neutral holding portion C1. Therefore, when the shift lever 6 is operated in the select operation direction (rotation direction), the holding member 3 can be returned to the neutral position (the position of the neutral holding portion C1) using the pressing force of the spring 27. The case of the second guide C3 is the same as that of the first guide C2.

  Thus, in this speed change operation mechanism 1, in addition to the select check mechanism and the shift check mechanism, a select return mechanism can be realized by the pressing mechanism 2 and the first guide portion C2.

(3)
In this speed change operation mechanism 1, in the state where the first ball member 26 is fitted in the neutral holding portion C1, the shift rod 4 is held in the rotational direction and the axial direction by the neutral holding portion C1. Thus, a shift check mechanism at the neutral position can be realized by the pressing mechanism 2 and the neutral holding portion C1.

(4)
In this speed change operation mechanism 1, the neutral holding portion C1 includes a groove G extending in the axial direction. The groove G is provided so that the first ball member 26 is fitted therein. For this reason, the first ball member 26 is easily fitted into the neutral holding portion C1, and the select check mechanism can be realized with certainty.

(5)
In this speed change operation mechanism 1, since the holding member 3 is fixed to the shift rod 4 as a separate member from the shift rod 4, the holding member 3 can be formed into an optimum shape regardless of the strength of the shift rod 4. .

(6)
In this speed change operation mechanism 1, the holding member 3 has the first side wall portion 33 that can come into contact with the pressing mechanism 2 in the rotation direction. The ball member 26 moves, and the pressing mechanism 2 comes into contact with the first side wall portion 33 eventually. That is, the pressing mechanism 2 and the first side wall portion 33 of the holding member 3 can realize a select stopper mechanism that limits the movement range of the holding member 3 in the selection operation direction (rotation direction).

(7)
In this speed change operation mechanism 1, since the holding member 3 has the second side wall portion 34 that can contact the pressing mechanism 2 in the axial direction, the first ball member 26 is fitted into the first speed holding portion Q <b> 1. Even if the holding member 3 further moves in the axial direction from the state of being in the protruding state, the pressing mechanism 2 contacts the second side wall portion 34. That is, the pressing mechanism 2 and the second side wall portion 34 can realize a shift stopper mechanism that limits the movement range of the holding member 3 in the shift operation direction (axial direction).

(8)
In this speed change operation mechanism 1, since the pressing mechanism 2 includes the protection member 23, it is possible to prevent the bearing support member 22 from being damaged due to a collision with the first side wall portion 33. Further, since the protection member 23 is rotatably supported by the bearing 24, the friction between the first side wall portion 33 and the protection member 23 even if the protection member 23 moves while contacting the first side wall portion 33. Can be reduced. Thereby, it can suppress that the operating force of the shift lever 6 increases.

(9)
In this speed change operation mechanism 1, since the first ball member 26 that contacts the holding member 3 is rotatable, the frictional resistance generated between the first ball member 26 and the holding member 3 can be reduced. Wear can be suppressed.

<Other embodiments>
The specific configuration of the present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the scope of the invention.

(A)
The present invention is applicable not only to manual transmissions for FF vehicles but also to manual transmissions for FR (Front Engine Rear Drive) vehicles.

(B)
In the above-described embodiment, the holding member 3 is a separate member from the shift rod 4, but the holding member 3 may be provided integrally with the shift rod 4 as shown in FIGS. 10 and 11, for example.

  The shift rod 104 includes a neutral holding portion C11, a first guide portion C12, a second guide portion C13, a front holding portion Q11, and a rear holding portion Q12.

  The 1st guide part C12 and the 2nd guide part C13 are arrange | positioned in the radial direction outer side rather than the virtual line K2 centering on the rotating shaft A. As shown in FIG. The front holding portion Q11 has a first groove G1 extending in the rotation direction. The rear holding part Q12 has a second groove G2 extending in the rotation direction.

  In this case, a select check mechanism, a select return mechanism, and a shift check mechanism can be realized. For this reason, compared with the conventional product, the number of parts can be further reduced and the weight can be reduced.

(C)
In the above-described embodiment, the pressing mechanism 2 and the holding member 3 realize five mechanisms (select check mechanism, select return mechanism, select stopper mechanism, shift check mechanism, and shift stopper mechanism). If the select check mechanism and the shift check mechanism can be realized, the number of parts can be reduced.

  For example, a case where the holding member 3 does not have the first side wall portion 33 and the second side wall portion 34 is also conceivable. In this case, the selection stopper mechanism and the shift stopper mechanism may be realized by other mechanisms.

  Moreover, the case where the holding member 3 does not have the 1st guide part C2 and the 2nd guide part C3 is also considered. In this case, for example, a select return mechanism may be realized by a conventionally used mechanism or the like.

(D)
The shape of the holding member 3 is not limited to the above-described embodiment. For example, the first speed holding portion Q1 to the sixth speed holding portion Q6 may be recessed to the extent that the holding member 3 is held in the axial direction with the first ball member 26 fitted.

  Depending on the shape of the holding member 3, the feeling of moderation when switching the gear position can be made substantially the same.

  Moreover, the 1st protrusion part P1-the 6th protrusion part P6 may be formed by the smooth curved surface rather than the shape shown in the above-mentioned embodiment.

  Furthermore, the shape of the neutral holding part C1 is not limited to the above-described embodiment. For example, a holding member 303 shown in FIG. 12 is also conceivable. In this case, the neutral holding portion C31, the first guide portion C32, and the second guide portion C33 corresponding to the neutral holding portions C1, C2 and the second guide portion C3 are formed by a substantially V-shaped groove G3. . Even in this case, a select check mechanism and a select return mechanism can be realized.

(E)
In the above-described embodiment, the pressing mechanism 2 is fixed to the case 5 and the holding member 3 is fixed to the shift rod 4. However, the arrangement of the pressing mechanism 2 and the holding member 3 may be reversed. For example, as shown in FIG. 13, the pressing mechanism 402 may be fixed to the shift rod 4 and the holding member 403 may be fixed to the case 5. Even in this case, the same effect as that of the above-described embodiment can be obtained.

(F)
In the above-described embodiment, the select operation direction corresponds to the rotation direction, and the shift operation direction corresponds to the axial direction, but is not limited thereto. For example, the select operation direction may correspond to the axial direction, and the shift operation direction may correspond to the rotation direction.

(G)
When the reverse gear holding portion is provided, a reverse operation prevention mechanism for the reverse gear is realized by setting the height of the reverse protrusion higher than the height of the first protrusion P1 to the sixth protrusion P6. be able to.

  Since the speed change operation mechanism according to the present invention can be reduced in weight, the present invention is useful in the field of transmissions.

Schematic configuration diagram of the speed change mechanism II-II sectional view of FIG. III-III sectional view of FIG. Schematic perspective view of holding member Operation explanatory diagram of the shift operation mechanism Operation explanatory diagram of the shift operation mechanism Operation explanatory diagram of the shift operation mechanism Operation explanatory diagram of the shift operation mechanism Operation explanatory diagram of the shift operation mechanism Schematic perspective view of shift rod (another embodiment) XI-XI sectional drawing of FIG. 10 (other embodiment) Schematic sectional view of the speed change operation mechanism (another embodiment) Schematic sectional view of the speed change operation mechanism (another embodiment)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shifting operation mechanism 2 Pressing mechanism 22 Bearing support member 23 Protection member 24 Bearing 25 Cylinder 26 1st ball member (contact member)
27 Spring (elastic member)
28 Second ball member (rolling element)
3 holding member 33 1st side wall part (an example of 1st contact part)
34 2nd side wall part (an example of 2nd contact part)
4 Shift rod 5 Case 6 Shift lever C1 Neutral holding part (an example of a first holding part)
C2 first guide part (an example of a guide part)
C3 2nd guide part (an example of a guide part)
Q1-Q6 1st-6th speed holding part (an example of the 2nd holding part)
P1 to P6 First to sixth protrusions G groove

Claims (8)

A shift lever supported by the case of the transmission body;
A shift rod supported by the case so as to be interlocked with the shift lever so as to be movable or rotatable in the select operation direction and movable or rotatable in the shift operation direction; ,
A holding member provided on one of the case and the shift rod;
A mechanism fixed to the other of the case and the shift rod, comprising a contact member that contacts the holding member, and a pressing mechanism that presses the contact member against the holding member;
The holding member includes a first holding portion in which the contact member can be fitted so that the shift rod is held in the select operation direction with respect to the case, and the shift rod is shifted with respect to the case. A second holding portion into which the contact member can be fitted so as to be held in the operation direction.
Shifting operation mechanism. The holding member is a portion arranged side by side with the first holding portion in the select operation direction, and the pressing force of the pressing mechanism is such that the contact member is guided toward the first holding portion. Having a guide part for converting a part of the torque into a rotational force of the shift rod,
The speed change operation mechanism according to claim 1. The first holding part can be fitted with the sliding member such that the shift rod is held in the select operation direction and the shift operation direction with respect to the case.
The speed change operation mechanism according to claim 1 or 2. The first holding portion includes a groove that extends in the shift operation direction and is provided so that the contact member can be fitted therein.
The speed change operation mechanism according to any one of claims 1 to 3. The holding member is fixed to the shift rod or provided integrally with the shift rod.
The speed change operation mechanism according to any one of claims 1 to 4. The holding member has a first abutting portion that is arranged side by side with the guide portion and in the select operation direction and can abut on the pressing mechanism and the select operation direction.
The speed change operation mechanism according to any one of claims 2 to 5. The holding member has a second abutting portion that is arranged side by side with the second holding portion in the shift operation direction and can abut on the pressing mechanism and the shift operation direction.
The speed change operation mechanism according to any one of claims 2 to 6. The pressing mechanism includes a support member that rotatably supports the contact member so that the contact member can move along an axis extending toward a rotation axis of the shift rod, and the contact member and the support. A plurality of rolling elements disposed between the support member, an elastic member disposed inside the support member and pressing the contact member against the holding member, and the first contact disposed on an outer peripheral side of the support member. A protection member capable of contacting the portion, and a bearing that rotatably supports the protection member around the axis with respect to the support member.
The speed change operation mechanism according to claim 6 or 7.

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